2009 BMW Z4 vs. 2003 BMW 325
To start off, 2009 BMW Z4 is newer by 6 year(s). Which means there will be less support and parts availability for 2003 BMW 325. In addition, the cost of maintenance, including insurance, on 2003 BMW 325 would be higher. At 2,497 cc (6 cylinders), 2009 BMW Z4 is equipped with a bigger engine. In terms of performance, 2003 BMW 325 (192 HP @ 6000 RPM) has 16 more horse power than 2009 BMW Z4. (176 HP @ 5800 RPM) In normal driving conditions, 2003 BMW 325 should accelerate faster than 2009 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 325 weights approximately 135 kg more than 2009 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2003 BMW 325 (245 Nm @ 3500 RPM) has 15 more torque (in Nm) than 2009 BMW Z4. (230 Nm @ 3500 RPM). This means 2003 BMW 325 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4.
Compare all specifications:
| 2009 BMW Z4 | 2003 BMW 325 | |
| Make | BMW | BMW |
| Model | Z4 | 325 |
| Year Released | 2009 | 2003 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2494 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 176 HP | 192 HP |
| Engine RPM | 5800 RPM | 6000 RPM |
| Torque | 230 Nm | 245 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Engine Bore Size | 82 mm | 84.1 mm |
| Engine Stroke Size | 78.8 mm | 75 mm |
| Engine Compression Ratio | 11.0:1 | 10.5:1 |
| Acceleration 0-100mph | 6.5 seconds | 7.1 seconds |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 3 doors |
| Vehicle Weight | 1345 kg | 1480 kg |
| Vehicle Length | 4100 mm | 4270 mm |
| Vehicle Width | 1790 mm | 1760 mm |
| Vehicle Height | 1310 mm | 1410 mm |
| Wheelbase Size | 2500 mm | 2730 mm |
| Fuel Consumption Overall | 8.2 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 55 L | 63 L |
